论文标题
在强侧带耦合方向上，被困离子的侧带冷却
Sideband Cooling of a Trapped Ion in Strong Sideband Coupling Regime
论文作者
论文摘要
关于捕获离子的基态激光冷却的常规理论研究主要集中在弱边带耦合（WSC）方向上，其中冷却速率与激发态的线宽成正比。在最近的工作中〜[New J. Phys。 23，023018（2021）]，我们提出了一个理论框架来研究在消失的载体过渡的假设下，在强侧带耦合（SSC）方向上，捕获离子的基态冷却。在这里，我们将此分析扩展到具有非变化载体过渡的更一般情况，我们表明，通过正确调整耦合激光器，可以实现与线宽成正比的冷却速率。我们的理论预测与SSC制度中相应的精确解决方案密切一致，该解决方案为边带冷却实验提供了重要的理论指导。
Conventional theoretical studies on the ground-state laser cooling of a trapped ion have mostly focused on the weak sideband coupling (WSC) regime, where the cooling rate is inverse proportional to the linewidth of the excited state. In a recent work~[New J. Phys. 23, 023018 (2021)], we proposed a theoretical framework to study the ground state cooling of a trapped ion in the strong sideband coupling (SSC) regime, under the assumption of a vanishing carrier transition. Here we extend this analysis to more general situations with nonvanishing carrier transitions, where we show that by properly tuning the coupling lasers a cooling rate proportional to the linewidth can be achieved. Our theoretical predictions closely agree with the corresponding exact solutions in the SSC regime, which provide an important theoretical guidance for sideband cooling experiments.
